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[Inserted in margin: Augustine (Concept of evil)
Non being is evil; evil is merely negative, the loss of good (privatio boni)." If things are deprived of all good they cease to exist. So long as they are, they are good. Whatever is, is good. The evil then whose source I sought is not a substance for were it a substance it would be good."
Confessions, VII. 12 (18).